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## Homework Statement

There are no numbers given, just a question of relation.

A box with mass m rest on a board. One side of the board lifts up until the box begins to slide. For this to happen, the angle theta that the board makes with the horizontal floor depends on:

m

a (g)

N

mu

## Homework Equations

Fnet = -muN + mg

## The Attempt at a Solution

I tried solving it in terms of the x component of W=mg.

So F=mg-f (f = muN or friction)

F=Wx - f

Wx=mg(sin theta)

Wx-muN=Wx-muWx

Wx(1-mu)

0=mg(sin theta)(1-mu)

Those were my best attempts to come up with some sort of equation for this.